Alright, let's work through 2904 times 9789 step by step
2904 × 9789 = 9789 × (2904)
+ 9789 × 4 resulting in 39156
+ 9789 × 00 what gives us 0
+ 9789 × 900 resulting in 8810100
+ 9789 × 2000 what gives us 19578000

= 28427256
